#include <MobaTools.h>
#define knop 2

MoToStepper stepper(200,STEPDIR);

void setup()
{  
  stepper.attach( 6,7);
  stepper.setMaxSpeed(150);
  stepper.setRampLen(100);
  stepper.rotate(1);
  pinMode(knop,INPUT_PULLUP);
}

void loop()
{
  int bState=digitalRead(knop);
   if (bState == 0){  
    stepper.setMaxSpeed(150);
  }
   if (bState == 1){  
    stepper.setMaxSpeed(30);
  }
  delay(20); // debouncing
}